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WorksheetsCycles
Total questions: 17
Worksheet time: 9mins
Which of the following biogeochemical cycles can be influenced by human activity and cause eutrophication of a local water supply?
Nitrogen cycle
Carbon cycle
Oxygen cycle
Water cycle
Bacteria convert atmospheric nitrogen to which of the following in the process of nitrogen fixation?
Nitrogen gas
Nitric Acid
Ammonia
Phosphorous
The burning of fossil fuels releases which of the following gases into the atmosphere?
Oxygen
Carbon Dioxide
Nitrate
Nitrogen
What role do decomposers play in the cycling of material in a biogeochemical cycle?
Decomposers make chemicals from the nonliving environment into organic compounds.
Decomposers incorporate some organic compounds into their bodies and release some back to the environment as waste.
Decomposers break down organisms to supply the soil, water, and air with inorganic chemicals.
Decomposers use nonliving processes such as rain and fire to make inorganic chemicals.
During which of the following steps of the water cycle is water changed from a vapor state to a liquid state?
Precipitation
Evaporation
Transpiration
Condensation
What impact can deforestation have on the water cycle?
Carbon dioxide is released into the air as trees are burned.
Photosynthesis increases, thereby increasing the amount of carbon dioxide in the air.
Transpiration declines.
The amount of nitrogen-fixing bacteria increases.
Carbon dioxide enters the atmosphere through each of the following processes except one which one?
burning fossil fuels
volcanic eruptions
photosynthesis
respiration
The use of fossil fuels is a concern because it can lead to which of the following?
global warming
eutrophication
increased runoff
polluted waters
A farmer has concerns about the nitrogen levels in her soils.
Plant a crop of mushrooms to speed up decomposition.
Plant a crop of legumes, such as clover or alfalfa.
Plant more plants to increase transpiration.
Clear cut the area surrounding the field.
Where is the largest reservoir of carbon on earth located?
in the oceans
in freshwater
on land
in the atmosphere
Marine organisms have carbon in their bodies in which of the following forms?
carbon dioxide
pure carbon
calcium carbonate
bicarbonate
Carbon in the bodies of marine organisms is often found in which of the following forms?
clastic sedimentary rock
chemical sedimentary rock
igneous rock
layered sedimentary rock
Which of the following is the source of energy for the water cycle?
gravity
winds
volcanic eruptions
the sun
Which of the following statements about the water cycle is true?
Organisms in the biosphere do not influence the water cycle.
The water cycle only continues during daylight hours.
Plants play a vital role in the water cycle.
Precipitation that falls to the ground ends up only as groundwater.
Why is nitrogen fixation such an important step in the nitrogen cycle?
Plants can’t use nitrogen in the form of N2N2.
Decomposers need to use NH4+NH4+.
Bacteria convert the fixed nitrogen back into N2N2.
Soil nitrogen is different.
How does deforestation affect the water cycle?
It leads to an increase in eutrophication.
It reduces the amount of carbon dioxide in the atmosphere.
It can alter precipitation patterns.
It increases the amount of transpiration.
The carbon cycle works in conjunction with which of the following?
water cycle
nitrogen cycle
cycling of oxygen
all biogeochemical cycles
